My response in this situation is something along the lines of: Jessica, I have a really busy schedule, and I would definitely like to see you, but if you can’t make definite plans with me, then how about we just do it some other time? Then you are going to wait for her response. It is what we call in sales, the Take Away or Negative Sale. If she says: Yes. Give me a call and we’ll make it for some other time… her attraction is low. If her attraction is high, she will more than likely say something along the lines of: No, I just wanted your number. I definitely want to see you.